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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
2002
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48028204 |
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Table of Contents:
- Induction of metamorphosis with KCl in three species of sea urchins and its implications in the production of juveniles E. Carpizo Ituarte A. Salas Garza G. Parés Sierra Ciencias de la Tierra sea urchin metamorphosis excess potassium signal transduction A common practice for inducing metamorphosis in larvae of marine invertebrates is the use of a wide variety of artificialinducers. Excess K+ and Cs+ in seawater have proved to be very effective for this purpose, but not universally effective to inducemetamorphosis in different phyla of marine invertebrates. In the present study we tested the response of three species of seaurchins to excess K+ in seawater as an artificial inducer. Excess K+ in seawater was presented to the larvae as continuous (24 h) orpulse exposure in concentrations ranging from 0.01 to 100 mM. Results showed that excess K+ in the form of KCl added toseawater was an effective metamorphic inducer of the three species of sea urchins tested; the purple sea urchin Strongylocentrotuspurpuratus, the red sea urchin S. franciscanus and the white sea urchin Lytechinus pictus. The response was dependent onconcentration and time of exposure. Continuous exposure (24 h or more) to excess K+ (100 mM) resulted lethal to the larvae ofthe three species. Excess K+ (100 mM) for 15 min resulted the most effective pulse-period to induce metamorphosis in the threespecies. This method of induction allows us to produce synchronous metamorphosed postlarvae useful for aquaculture and studiesof signal transduction mechanisms during metamorphosis of sea urchins. 2002 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48028204 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.28